Visual motion aftereffect in human cortical area MT revealed by functional magnetic resonance imaging

Article Abstract:

Human cortical area MT (V5) is selectively activated during the perceptual motion after effects. Functional magnetic resonance imaging (fMRI) was used to measure local hemodynamic changes (reflecting electrical activity) in MT during the production of the visual motion aftereffect. This technique is also known as waterfall illusion. MT responds better to moving than to stationary visual stimuli. The cells in the MT are direction-specific since the motion aftereffect is the same.

Analysis, Measurement, Hemodynamics, Magnetic resonance imaging, Visual fields, Higher nervous activity

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Representation of motion boundaries in retinotopic human visual cortical areas

Article Abstract:

Scientists have identified motion segmentation in human visual cortical activity using functional magnetic resonance imaging techniques. The boundary-specific, retinotopically organized signal is seen in early visual areas starting from the primary visual cortex of the retinal image. Scientists believe the perceptual salience of the boundaries exhibit similar surface velocity properties.

Vision research, Visual cortex

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Plasticity and its limits

Article Abstract:

Neuroscientists have studied the cortical plasticity in adults, which are found to have implications for recovery from brain damage and the role that sensory experience plays in it. The possibility of plasticity in the adult cortex works on the factor that, if one tries hard enough, it is possible to overcome neural adversity.

United States, Science & research, Research, Plasticity, Brain damage

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